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The weakest of all the q-switched devices and somewhat similar to the Ruby laser in that the Alexandrite creates a red light which is highly absorbed by green and dark tattoo pigments. However, the alexandrite laser color is slightly less absorbed by melanin, so this laser has a slightly lower incidence of unwanted pigmentary changes than a ...
Cryogen spray: sprayed directly onto the skin immediately before and/or after the laser pulse; Air cooling: forced cold air at -34 °C; In essence, the important output parameter when treating hair (and other skin conditions) is power density – this is a combination of energy, spot diameter and pulse duration.
Alexandrite in sizes over three carats are very rare. Today, several labs can produce synthetic lab-grown stones with the same chemical and physical properties as natural alexandrite. Several methods can produce flux-grown alexandrite, Czochralski (or pulled) alexandrite, and hydrothermally-produced alexandrite.
A physician performing laser resurfacing using an erbium laser Laser resurfacing is a laser surgery technique that disassociates molecular bonds . It is used for the treatment of wrinkles, solar lentigenes , sun damage , scarring ( acne scars and surgical scars), stretch marks , actinic keratosis , and telangiectasias .
Indigenous American body painting. Body painting is a form of body art where artwork is painted directly onto the human skin. Unlike tattoos and other forms of body art, body painting is temporary, lasting several hours or sometimes up to a few weeks (in the case of mehndi or "henna tattoos" about two weeks). Body painting that is limited to ...
The Alexandrite effect has also been observed in some other minerals, such as fluorite, sapphire, kyanite, monazite, spinel, garnet, tourmaline, and rare-earth oxalates. Not to be confused with the alexandrite effect, some minerals also exhibit pleochroism. The former is a response to different wavelengths of light in general, the latter an ...
Painting one of her living subjects. In 2009, an assignment in an elective art class at Vassar College sparked Meade's curiosity. She decided to explore space and light through the idea of putting black paint on the ground where the shadows were cast. She later expanded the concept by making a grayscale "mapping of light" with paint on the ...
Q-switching, sometimes known as giant pulse formation or Q-spoiling, [1] is a technique by which a laser can be made to produce a pulsed output beam. The technique allows the production of light pulses with extremely high peak power, much higher than would be produced by the same laser if it were operating in a continuous wave (constant output) mode.